<?php
/**
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; under version 2
 * of the License (non-upgradable).
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright (c) 2008-2010 (original work) Deutsche Institut für Internationale Pädagogische Forschung (under the project TAO-TRANSFER);
 *               2009-2012 (update and modification) Public Research Centre Henri Tudor (under the project TAO-SUSTAIN & TAO-DEV);
 *
 */

declare(strict_types=1);

/**
 * Short description of class tao_helpers_form_validators_NotEmpty
 *
 * @access public
 * @author Joel Bout, <joel.bout@tudor.lu>
 * @package tao
 */
class tao_helpers_form_validators_NotEmpty extends tao_helpers_form_Validator
{
    /**
     * Short description of method evaluate
     *
     * @access public
     * @author Joel Bout, <joel.bout@tudor.lu>
     * @param  mixed $values
     * @return bool
     */
    public function evaluate($values)
    {
        if (is_string($values)) {
            return !empty(trim($values));
        }

        if (is_array($values)) {
            return count($values) >= 1;
        }

        return is_scalar($values);
    }

    protected function getDefaultMessage()
    {
        return __('This field is required');
    }
}